IEEE Antennas and Wireless Propagation Letters, 2000
ABSTRACT This letter proposes wearable electronic modules on textile, suitable for garment integr... more ABSTRACT This letter proposes wearable electronic modules on textile, suitable for garment integration, based on antennas magnetically coupled to the active circuitry. The coupling mechanism is based on a heterogeneous transformer with the primary and secondary windings implemented in the antenna and in the circuitry substrate (hybrid or monolithic), respectively. The proposed coupling topology avoids galvanic contacts between the antenna and the active circuitry, allowing for interconnecting the antenna by a mere placing and gluing process. Bonding and soldering processes, often critical for textile materials, are thus avoided. The pro-posed innovation, mitigating the industrial realization constraints posed by textile implementation of active antennas and radio frequency identification (RFID) tags, should unsurprisingly enable and foster industrial developments of garment RFID, wearable electronics and body-centric communications systems. A patch antenna with transformer based on textile materials and operating in the frequency band 2.4–2.4835 GHz is designed, realized, and measured.
ABSTRACT In this article a paper-based contactless frequency doubler for harmonic RFID applicatio... more ABSTRACT In this article a paper-based contactless frequency doubler for harmonic RFID applications is described, fabricated and measured. The doubler, realized on paper substrate, generates the harmonic signal only by means of a Schottky diode. The fundamental and harmonic frequencies are wirelessly transferred to and from the doubler by coupled aerial resonators. The system operates at 7.5 and 15 MHz and these frequencies are chosen, without lack of generality, to accomplish for the future realization of a fully organic frequency doubler exploiting paper printed coils and organic diode (pentacene based), the present frequency limit of which is nowadays around 15 MHz. This perspective realization constrained also the geometry of the planar resonators that, although the diode at this level of the development is a conventional lumped one, are suited to host pentacene depositions and organic diode electrodes.
IEEE Antennas and Wireless Propagation Letters, 2000
ABSTRACT This letter proposes wearable electronic modules on textile, suitable for garment integr... more ABSTRACT This letter proposes wearable electronic modules on textile, suitable for garment integration, based on antennas magnetically coupled to the active circuitry. The coupling mechanism is based on a heterogeneous transformer with the primary and secondary windings implemented in the antenna and in the circuitry substrate (hybrid or monolithic), respectively. The proposed coupling topology avoids galvanic contacts between the antenna and the active circuitry, allowing for interconnecting the antenna by a mere placing and gluing process. Bonding and soldering processes, often critical for textile materials, are thus avoided. The pro-posed innovation, mitigating the industrial realization constraints posed by textile implementation of active antennas and radio frequency identification (RFID) tags, should unsurprisingly enable and foster industrial developments of garment RFID, wearable electronics and body-centric communications systems. A patch antenna with transformer based on textile materials and operating in the frequency band 2.4–2.4835 GHz is designed, realized, and measured.
ABSTRACT In this article a paper-based contactless frequency doubler for harmonic RFID applicatio... more ABSTRACT In this article a paper-based contactless frequency doubler for harmonic RFID applications is described, fabricated and measured. The doubler, realized on paper substrate, generates the harmonic signal only by means of a Schottky diode. The fundamental and harmonic frequencies are wirelessly transferred to and from the doubler by coupled aerial resonators. The system operates at 7.5 and 15 MHz and these frequencies are chosen, without lack of generality, to accomplish for the future realization of a fully organic frequency doubler exploiting paper printed coils and organic diode (pentacene based), the present frequency limit of which is nowadays around 15 MHz. This perspective realization constrained also the geometry of the planar resonators that, although the diode at this level of the development is a conventional lumped one, are suited to host pentacene depositions and organic diode electrodes.
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Papers by M. Virili